IBM RT PC 10 Hardware Maintenance And Service page 163

3-118 Service Manual
64x
FRU: Personal Computer AT High Capacity Diskette Drive
Additional Tests: Run the Diskette Drive(s) Checkout.
Removal Procedure: See "Diskette Drive Removal" on page 4-24.
Repair Checkout: Run the Diskette Drive(s) Checkout.
74x
FRU: 40MB Fixed-Disk Drive
Additional Tests: None
Removal Procedure: See "Fixed-disk Drive Removal" on page 4-28.
Repair Checkout: Run the Fixed-disk Drive(s) Checkout.
78x
FRU: Keyboard
Additional Tests: None
Removal Procedure: See Section 10.
Repair Checkout: Run the Keyboard Checkout.